Actinostola sp.1

Sanamyan, N. P., Sanamyan, K. E., Bocharova, E. S., Morozov, T. B. & Galkin, S. V., 2023, Sea anemones (Actiniaria, Corallimorpharia and Zoantharia) from the Western Bering Sea (Northwest Pacific), Invertebrate Zoology 20 (1), pp. 27-56 : 38

Actinostola sp.1

Fig. 3D .

MATERIAL. LV-75-2, 55.4165ºN 167.2749ºE – 55.4169ºN 167.2749ºE, depth 409– 372 m, three specimens photographed; LV-75-3, 55.4168ºN 167.2730ºE – 55.4158ºN 167.2739ºE, depth 407– 353 m, ten specimens photographed; LV-75-4, 55. 4164ºN 167.2764ºE, depth 400 m, one specimen photographed; LV-75-8, 55.4168ºN 167.2750ºE, depth 389 m, one specimen photographed; LV-75- 9, 55.4173ºN 167.2761ºE – 55.4160ºN 167.2743ºE, depth 377– 350 m, five specimens photographed.

LV-82-1, 55.4171ºN 167.2773ºE – 55.4160ºN 167. 2744ºE, 386– 373 m, one specimen collected (sample 1) and ten specimens photographed.

REMARKS. More than 30 specimens were photographically documented during two expeditions in 2016 and 2018, several more were recorded on video, one of them was collected. This is large (up to 20 cm in diameter of the tentacular crown) sea anemone with wide undulating oral disc and very numerous, up to 500 or more, soft tentacles without mesogloeal thickenings at the base. The tentacles are not longer than the radius of the oral disc; they are distributed on the outer half of the oral disc in 6–7 cycles. The color is usually plain, red to white, often orange, from bright to dull. The limbus is paler than the column. Actinopharynx is red. The species was recorded on the 350–409 m on the northern top of the Piip Volcano and is the most common species among large sea anemones here. This species was not recorded in areas of hydrothermal activity.

Figures

Fig. 3. A — Sicyonis sp.; B — Ophiodiscus bukini; C — Actinostola faeculenta; D — Actinostola sp.1; E — Actinostola sp.2; F — Actinostola sp.3; G — Actinostola sp.4; H — Actinostola sp.5 (photo of N. Sanamyan); I — Stomphia sp.; J — Tealidium konoplinorum; K — cf. Halcampa sp. from the northern slope of the Piip Volcano; L — cf. Halcampa sp. from the southern slope of the Piip Volcano. Рис. 3. A — Sicyonis sp.; B — Ophiodiscus bukini; C — Actinostola faeculenta; D — Actinostola sp.1; E — Actinostola sp.2; F — Actinostola sp.3; G — Actinostola sp.4; H — Actinostola sp.5 (фото Н. СанамЯн); I — Stomphia sp.; J — Tealidium konoplinorum; K — cf. Halcampa sp. на северном склоне вулкана Пийпа; L — cf. Halcampa sp. на южном склоне вулкана Пийпа.